... tube release and connect easily 2.Thread size:1/8",1/4",3/8",1/2" 3.Tube ... installation, plastic pipe and rotate at random3. Release ring adopts pllipse design, so removing for it ... touch fittings provide instant tubing connections: 2)Elliptical release ring help to connect the tube easily by ... manual, no special tools required. 3)(Nickel-plated )brass threaded bodies ensures anti-corrosion ...